Clamp



FIG. 1 is a front elevational view of a clamp according to my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a sectional view taken on line 7—7 of FIG. 6.

The ornamental design for a clamp, as shown and described.